There are a variety of mental mathematics strategies for each basic operation, and opportunities to practice these strategies give students the tools to use them at appropriate times. For example, with addition, mental mathematics strategies include:
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The terms used in addition are 23--> addend + 46--> addend= 69 sum.
Apply strategies, including place value and the properties of addition to determine the sum or difference of two whole numbers, each 999,999 or less. (b)
Demonstrate fluency with addition and subtraction within 10. (b)
model the problem using manipulatives, representations, or number sentences/equations.
The least number of steps necessary to solve a single-step problem is one.